The scenario that represents mitosis in action is:
D: a skin cell repairing itself after a cut.
Mitosis is the process by which a cell divides its nucleus and genetic material, ultimately leading to cell division and the production of two identical daughter cells. In this case, skin cells would divide to replace those lost or damaged in the healing process after a cut.
Let's briefly look at the other options:
A: A virus undergoing the lytic cycle involves viral replication and is not related to mitosis.
B: A sperm cell fusing with an egg cell involves fertilization, which is a combination of gametes, not cell division through mitosis.
C: A liver cell preparing to produce enzymes may involve cellular processes but does not specifically indicate that mitosis is taking place.
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